class A {
   public int getNumber(int a) {
      return a+1;
   }
}
class B extends A {
   public int getNumber (int a) {
      return a+100;
   }
   public static void main (String args[]) {
      A a =new A();
      System.out.println(a.getNumber(10));
      a = new B();
      System.out.println(a.getNumber(10));
   }
}

